
The National Risk Index, put together by the Federal Emergency Management Agency (FEMA), is based on calculations by 80 experts over six years and reveals the risks for each county in the United States for 18 natural hazards including earthquakes, hurricanes, tornadoes, floods, volcanoes, tsunamis and even winter weather.,The 18 natural hazards included in the index are avalanches, coastal flooding, cold wave (a cooling of air), drought, earthquake, hail, heat wave, hurricane, ice storm, landslide, lightning, river flooding, strong wind, tornado, tsunami, volcanic activity, wildfire and winter weather.,While the risk of hurricanes is not applicable in Los Angeles County, several other hazards are very high, including wildfires, earthquakes and river flooding.,Philadelphia County, Pennsylvania; Score: 57.72 Most at risk for heat waves, ice storms, lightning, river flooding, strong winds, tornadoes and winter weather.,The county is at very high risk of heat waves, ice storms, strong winds, tornadoes and winter weather.